\documentclass[tikz]{standalone}

%\usepackage{pgf,pgfplots}
%\pgfplotsset{compat=1.17}
%\usepackage{mathrsfs} %provides nicer typesetting of calligraphic letters: $\mathscr{ABC}$
\usetikzlibrary{arrows}

\begin{document}

\definecolor{ffqqqq}{rgb}{1,0,0}
\definecolor{ududff}{rgb}{0.30196078431372547,0.30196078431372547,1}
\begin{tikzpicture}[line cap=round,line join=round,>=triangle 45,x=1cm,y=1cm]
\clip(2,0.5) rectangle (8,8.5);
\draw [line width=2pt] (3,8)-- (7,8);
\draw [line width=2pt] (7,8)-- (3,7);
\draw [line width=2pt] (3,7)-- (7,7);
\draw [line width=2pt] (7,7)-- (3,6);
\draw [line width=2pt] (3,6)-- (7,6);
\draw [line width=2pt] (7,8)-- (3,6);
\draw [line width=2pt] (7,8)-- (3,5);
\draw [line width=2pt] (3,5)-- (7,5);
\draw [line width=2pt] (7,7)-- (3,5);
\draw [line width=2pt] (7,6)-- (3,5);
\draw [line width=2pt] (7,4)-- (3,2.5);
\draw [line width=2pt] (7,3)-- (3,2.5);
\draw [line width=2pt] (7,2)-- (3,2.5);
\draw [line width=2pt] (7,1)-- (3,2.5);
\draw (7.258,8.2) node[anchor=north west] {$c_1$};
\draw (7.258,7.2) node[anchor=north west] {$c_2$};
\draw (7.258,6.2) node[anchor=north west] {$\cdots$};
\draw (7.258,5.2) node[anchor=north west] {$c_k$};
\draw (7.258,4.2) node[anchor=north west] {$c_1'$};
\draw (7.258,3.2) node[anchor=north west] {$c_2'$};
\draw (7.258,2.2) node[anchor=north west] {$\cdots$};
\draw (7.258,1.2) node[anchor=north west] {$c_k'$};
\draw (2.154,8.2) node[anchor=north west] {$n_1$};
\draw (2.154,7.2) node[anchor=north west] {$n_2$};
\draw (2.154,6.2) node[anchor=north west] {$\cdots$};
\draw (2.154,5.2) node[anchor=north west] {$n_k$};
\draw (2.154,2.7) node[anchor=north west] {$n'$};
%\draw (1.56,8.9) node[anchor=north west] {vote strengths};
\begin{scriptsize}
\draw [fill=ududff] (3,8) circle (2.5pt);
\draw [fill=ududff] (7,8) circle (2.5pt);
\draw [fill=ududff] (3,7) circle (2.5pt);
\draw [fill=ududff] (7,7) circle (2.5pt);
\draw [fill=ududff] (3,6) circle (2.5pt);
\draw [fill=ududff] (7,6) circle (2.5pt);
\draw [fill=ududff] (3,5) circle (2.5pt);
\draw [fill=ududff] (7,5) circle (2.5pt);
\draw [fill=ududff] (7,4) circle (2.5pt);
\draw [fill=ududff] (7,3) circle (2.5pt);
\draw [fill=ududff] (7,2) circle (2.5pt);
\draw [fill=ududff] (7,1) circle (2.5pt);
\draw [fill=ududff] (3,2.5) circle (2.5pt);
\end{scriptsize}
\end{tikzpicture}

\end{document}